And vaccine can't be 100% effective, so it's likely covid-19 will stay with us for long. We have vaccine for flu, but this virus is still here and new kind of vaccine is needed every year. So, I'm a bit sceptical about covid-19 vaccine, I doubt it's going to be panacea.
I am fairly confident that they will find a working vaccine in the beginning of next year as all pharmaceutical companies are putting huge efforts in it. But as you mention, there will be a lot of people who will be afraid of the vaccine or who simply don't want to take it. So probably in July 2021, the virus will still be around. One thing is certain; the experience around the Olympic games will be totally different.